750 Virgin

The Forum for RacingSparrow radio controlled yachts. Focussing on build your own scratch building, free plans for download and a comprehensive builders guide book.

Best wishes and happy sailing, Bryn Heveldt.

750 Virgin

Joined: November 9th, 2014, 1:58 pm

November 9th, 2014, 3:37 pm #1

Just obtained my plans & book and before starting the build I have a question :?: Doing the geometry on the sail winch arm it showed the main cannot go completely out. I am a big boat sailor with a 34 footer and alway let my main out until it touches the shrouds for maximum performance and stability when going down wind, so ideas on the 750 :?: I suppose a drum which could be a solution. Also what make & model of Transmitter/receiver/sail winch and helm winch should I use for both a sail arm arrangement or with a drum winch :?:
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Joined: May 27th, 2014, 6:58 am

November 9th, 2014, 10:15 pm #2

Hi Keith
Re the drum v the arm, I went with the winch much for the reason you mentioned.
Got the winch from hobbyking for less the $20 if you want more detail let me know.
Radio also from HK 24GHZ (the orange one) with a R615X receiver also a power control to limit the voltage, 2 cell Lithium ion battery pack 7.2 volt 1100 ma hour, a little big but had one on hand, lasts for ever.
The winch lay out is best seen on my build at the thread My 750 build

May your balsa wood be straight

Russell
Maker Of Things
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Joined: September 6th, 2012, 9:19 am

November 20th, 2014, 4:11 pm #3

It is also possible to double the sheet movement with an arm by fixing the end of the sheet to a bulkhead and running through a pulley on the end of the arm.
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